Machine for grinding or truing bottle-stoppers and other articles.



LN. BRUNER.

MACHINE FOR GRINDING OR TRUTNG BOTTLE STOPPERS AND OTHER ARTICLES.APPLICATION FILED NOV. 13. 1915'.

1,301,377. T Patented Apr. 22, 1919.

17306162 07." fim/zgleejrmer L. N. BRUNER. MACHINE FOR GRINDING 0RTRUING BOTTLE STOPPEHS AND OTHER ARTI APPLICATION FILED NOV. 13. 1916.

CLES. 1,301,377.

3 SHEETS-SHEET 2- Patented Apr. 22,1919.

L. N. BR UVNER. MACHINE FOR GRINDING 0R TRUING BOT TLE STOPPERS ANDOTHER ARTICILES.

Patented Apr. 22, .1919.

3 SHEETSSHEET 3.

r rn LoUIs NAG-LEE BRUNER, or ZURICH, SWITZERLAND.

Specification of Letters Patent.

Patented Apr. 22, 1919.

Application filed November 13, 1916. Serial No. 131,183,

T 0 all whom it may concern Be it known that I. LOUIS NAGLEE BRUNER,acitizen of the United States of America, residing at 7Bellerivestrasse, Zurich, Switzerland, glass manufacturer, have inventedcertain new and useful Improvements in or Relating to Machines forGrinding or Truing Bottle-Stoppers and other Articles, of which thefollowing is a specification.

This invention has reference to machines for grinding or truing bottles,stoppers. or other articles.

The invention is however applicable to any grinding machines in whichthe grinding wheels or abrading devices are carried by slides which areautomatically moved up toward the work by cams or otherwise, and inwhich the exact adjustment of the grinding wheel relatively to the workis effected by an adjusting wheel usually operated by hand.

In certain known machines of this kind an adjusting device has beenproposed comprising an .annularly grooved hub which works on a threadedstud fixed in the slide carrying the grinding wheel. In the groove ofthe hub a forked operating lever engages for the purpose of moving theslide toward and from the work, and the hub carries a hand-wheel for thepurpose of effecting the necessary adjustments manually.

Such adjustments were only intended to be made at intervals and were notadapted to compensate for the extremely minute degree of wear occurringat each individual grinding operation.

Now according to this invention improved means are provided for giving,automatically, a very fine or micrometer adjustment of the grindingwheel forward toward the work after each individual grinding action,such adjustment being so fine in factthat it amounts to only a minutefraction of a 1nillimeter at each operation. This micrometer adjustmentis effected by means of link-work which in the to-andfro motion of theslide serves to actuate the operative parts of a suitable feed device.By reason of the link work actuation, the arrangement is distinguishedfrom known means in which the ad justment is effected by tappetsactuated by impact only, and therefore liable to be irregular where veryfine adjustments are concerned.

In applying the invention, by way of example to a machine of the kindreferred to,

the grooved huh carrying the hand wheel, is comlnued with a bracket forcarrying the main portion of the improved feed device.

This bracket has a boss or eye at the top which fits over part of thenave of the hand wheel and which at the bottom is suitably guided sothat it can move freely parallel with the threaded stud. The saidbracket is combined with a radius arm for actuating the pawl arrangementof the feed device positively, as, hereinafter explained.

In order that the invention may be clearly understood and readilycarried into effect reference will now be had to the accompanyingdiagrammatic drawings in which Figure l. is a general side view of oneexample of the improved feed mechanism, the parts being in the positionin which the grinding tool is in contact with the work.

Fig. 2 is a vertical part section on the line 22 and 2 2 of Figure 1.

Fig. 3, is a horizontal part section through the aforesaid bracket onthe line 33 of Fig. 2.

Fig. at is a detail view taken longitudinally through the hub.

Fig. 5 is a side view of the operating lever and cam.

In these drawings, a is the annular groove in hub, which is providedwith the hand wheel a 7) is the threaded stud on which it works afterthe manner of a nut, c is the slide (carrying the grinding wheel) inwhich the stud Z) is secured, and d is a forked lever engaging the hub(r and serving to move the slide relatively to the work to press thegrinder on to the latter at the proper times, this lever being mountedon a stand (Z (see Fig. 5) and carrying a roller (5 which is acted on bya cam 0Z carried by a shaft d as in known arrangement.

6 is the aforesaidbracket which serves to carry the improved feeddevice. 7 is the boss or eye thereof fitting .over a sleeve (1* one endof which is secured to the nave of the wheel a The said wheel a is inthis case provided around its edge with notches or recesses a formingworm-teeth.

g g are guide pieces projecting from the bottom of the bracket. Theseguides lie on each side of the actuating or presser lever (Z, after themanner of a clip or fork, so that thebracket can move along ithe stud bbut will not turn with the wheel a ()ne side of the aforesaid hub grooveis formed by the right-hand edge f of the boss 7 and the other by aflange a on the sleeve (1".

In the bottom or hanging part of the bracket 6 is mounted a worm h whichmeshes with the teeth a formed in the periphery of the hand-wheel or itsequivalent a mounted on the annularly grooved hub or nut a. The stem orspindle h of this worm is fitted in two bosses e It carries a ratchetdisk or wheel 2' operated by a spring pawl j at the end of a rockinglever or radius arm j mounted coaxially with such ratchet wheel andforming part of a link work system. In this way the pawl is constantlyconnected with the parts which operate it, and an even and regularaction is assured.

The bracket 6 and the parts carried thereby, being mounted on theaforesaid threaded-stud .7) will move to-and-fro along with the slidewhich carries the grinding wheel. In order therefore to cause the pawlor clawker j to operate the ratchet wheel during these to-and-fromovements, the rocking lever orradius arm j, (which may be normally moreor less inclined to the horizontal) is connected to one end of a linklcwhich is more or less at right angles thereto. The

other end of this link is mounted on a stationary pivot pin 70 adjustably secured in a slotted bar Z screwed into the main frame of themachine.

The arrangement is such that as the bracket movesto-and-fro with theslide, the link is caused to rock on its stationary pivot and imparts acorresponding rocking motion to the pawl. The movements of this lattertherefore turn the ratchet disk 2' through the space of one or moreteeth, and cause it, by means of the aforesaid worm, to give a veryminute rotary movement to the hand-wheel a with which it is geared, andtherefore also to the annularly grooved hub or nut a of said wheel, thusfeeding the slide and the grinding Wheel forward relatively The abovearrangement is described only by Way of example, as it will be obviousthat the invention may be modified in various ways in carrying the sameinto practice without departing from the general nature thereof.

I claim 2- 1. In a grinding or truing machine of the kind referred to,the combination of a slide carrying the grinder, a threaded studconnected with said slide, a grooved hub on said stud, a worm and wormgear for partly rotating such hub at each stroke, and a presser leverengaging in said grooved hub, substantially as described.

2. In a grinding machine of the kind referred to, the combination of areciprocating slide, an adjusting screw fixed to said slide, an adjusting wheel having a nut-like hub on said screw, and link work forslightly rotating such adjusting wheel at each to and fro motion of theslide, substantially as described. V

In testimony whereof I have signed my name to this specification.

LOUIS NAGLEE BRUNER.

Witnesses CHARLES E. TAYLER, LUCY COSTIGAN.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissionerof iatants. Washington, D. 0."

